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4000_4G3-5A Rings Brass
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4000_4G4-10 Rings Pre-Tinned Brass
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4000_4G4-16 Rings Pre-Tinned Brass
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1953 patent drawing showing two terminals being attached at once from ETCO's 2020 brochure of electrical terminals and application machinery

ETCO 1948 Patent Application Drawings - Electric Terminal Applicator Machine Page 2

ETCO 1948 Patent Application Drawings - Electric Terminal Applicator Machine Page 1

Note that the compression power was a Ford Air Brake so the crimp was squeezed (not smacked) to provide a superior connection.

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